While Icarus had worked on other products in the past - notably the relatively well-received iPhone game adaptation of Showtime's serial killer drama Dexter - its main thrust was post-apocalyptic MMO/FPS Fallen Earth, set in a ruined Grand Canyon area after a series of disasters strike the United States.
Fallen Earth launched last September to mediocre reviews, Fallen Earth Gold currently sitting at a 71 on Metacritic. One can only imagine that the game simply didn't perform well enough to keep the lights on at Icarus. The aforementioned forum post from community manager Tiggs assures players that the game will continue to operate despite the "restructuring," but it's hard to see how it could bounce back from what is effectively the shuttering of the entire development studio.
It's always a tragedy when a studio goes out of business like Icarus apparently has - especially since Icarus, like The Escapist, had its headquarters here in North Carolina's Research Triangle.
The best of luck to all those affected, and we at The Escapist hope you land on your feet soon enough(Fallen Earth Chips).